# Building On-call: Time, timezones, and scheduling

DevFeed: [Building On-call: Time, timezones, and scheduling](<https://devfeed.tech/articles/building-on-call-time-timezones-and-scheduling-12044.md>)

Original publisher: [Read original article](<https://incident.io/blog/time-time-zones-and-scheduling>)

Author: Henry Course

Published: 2024-07-18T15:40:00Z

Content type: article

Language: en

Sources: [The incident.io Blog](<https://devfeed.tech/sources/the-incident-io-blog.md>)

Topics: [configuration](<https://devfeed.tech/topics/configuration.md>), [Databases](<https://devfeed.tech/topics/databases.md>), [Stack Overflow](<https://devfeed.tech/topics/stackoverflow.md>)

Tags: [building](<https://devfeed.tech/tags/building.md>), [configuration](<https://devfeed.tech/tags/configuration.md>), [databases](<https://devfeed.tech/tags/databases.md>), [incident](<https://devfeed.tech/tags/incident.md>), [incident-channel](<https://devfeed.tech/tags/incident-channel.md>), [incident-management](<https://devfeed.tech/tags/incident-management.md>), [incident-response](<https://devfeed.tech/tags/incident-response.md>), [on-call](<https://devfeed.tech/tags/on-call.md>), [outage](<https://devfeed.tech/tags/outage.md>), [post-mortem](<https://devfeed.tech/tags/post-mortem.md>), [slack-incident](<https://devfeed.tech/tags/slack-incident.md>), [testing](<https://devfeed.tech/tags/testing.md>), [time](<https://devfeed.tech/tags/time.md>)

## AI overview

This article explains how Incident.io built and tested an on-call scheduler that calculates which users are on shift for a configured schedule. It discusses rotations, working hours, round-robin assignments, shift overrides, handover periods, time zones, and daylight saving rules.

## Source excerpt

Time is tricky, but building our On-call scheduler meant getting cozy with all of its quirks-- and lots of testing. No "time" like the present to dive in!